CN102405887A - Method for breeding silkworm variety with medium-fine denier - Google Patents
Method for breeding silkworm variety with medium-fine denier Download PDFInfo
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Abstract
A method for breeding silkworm variety with medium-fine denier belongs to the technical field of breeding the crop varieties. The method comprises the following steps of adopting the living pupa reeling technology to breed the long-filament base variety of which the denier of cocoon filament is medium-fine, the uniformity is good and the cocoon filament is long; hybridizing the base variety with the varieties of which the denier of cocoon filament is medium-fine and physique is good in summer and autumn; and breeding the silkworm variety with medium-fine denier. 'Siyu Yihao' (a variety of the silkworm) is bred by the method. The 'Siyu Yihao' is characterized in that the physique is good and the silkworm is easy to breed; the shape of the cocoon is medium, and the collapse is medium-fine; the filament of the cocoon is long, the denier of the cocoon filament is medium-fine, the uniformity of the cocoon filament is good, the comprehensive mean square error of the cocoon filament is small, the neatness is excellent, and the reproduction performance is good. The silkworm variety can be bred in Yangtze River basin or Yellow River basin in spring and autumn. The raw material cocoon of the variety can be reeled to prepare the 5A-level and 6A-level high-grade raw silk, and the denier of the raw silk produced by the variety is small.
Description
Technical field
The invention belongs to variety of crops and cultivate technical field, relate to a kind of selection of middle fine denier silkworm kind; Be exclusively used in the seed selection of high-quality high-grade raw silk silkworm inter breed crossing combination.
Background technology
The sericulture filature is the great invention of of Ancient Times in China, and the silk industry of China has been made extremely important contribution to World Economics and human civilization, and Silk Culture is a bright jewel in the Chinese nation long cultural and historical long river.At present China is silk the biggest in the world producing country, and the silk product output accounts for more than 80% of world's total amount; Other silk producing countries mainly contain countries such as India, Brazil.But China also is not silk power.The raw silk quality and the international most advanced level of China also have a certain distance, and low-grade raw silk proportion is bigger in mainly showing, the ratio of 5A, 6A level high-grade raw silk is less, especially also has tangible gap on the indexs such as raw silk size maximum deviation and cleaning.China's silkworm kind size of cocoon filament deviation is big, is difficult to satisfy the requirement of reel silk from cocoons system high-grade raw silk under the automatic silk reeling process conditions.Therefore, cultivating the new varieties that are fit to the requirement of production high-grade raw silk, is the important topic of silkworm breeding.
The size of cocoon filament is one of important character of silkworm kind, receives the influence of gene control and environmental condition (mainly being the degree of being satiated with food).Solving the big problem of China's raw silk size deviation, need be that silkworm breeding begins from raw material cocoon source.The principle that depends on silk slope, silk rate of change, the size of cocoon filament and intragranular fiber number deviation according to the raw silk size deviation; The size of cocoon filament has remarkable influence to the raw silk average fineness; The size of cocoon filament is thin more, and the raw silk average fineness is also more little, and the raw silk size deviation is also more little.Therefore, suitably reduce the silkworm kind size of cocoon filament, can when keeping the good economic characters of silkworm kind, reduce the comprehensive mean square error of the size of cocoon filament.
For this reason, we have established the cultivation target of fine denier silkworm kind in the high-quality: with the silk quality is the center, with Xie Shuhao, clean excellent, suitably reduces the size of cocoon filament, improves the silk uniformity, reduces the maximum fiber number deviation of raw silk.According to former study, make full use of the genetic development of proterties such as the size of cocoon filament, through the choose reasonable breeding parent, assembly hybrid combination, make parent's merit obtain complementary with demonstrate fully.
Summary of the invention
The technical problem that solves: the selection that the object of the present invention is to provide a kind of middle fine denier silkworm kind; Utilize crossbreeding technology; A kind of selection is provided; Can select that size of cocoon filament mean square error is little, fine denier silkworm inter breed crossing combination in the high-quality that is fit to production high-grade raw silk, and its disease resistance and resistance meet or exceed the level of existing silkworm kind.
Technical scheme: the selection of fine denier silkworm kind in a kind of, step is:
(1) the long basic breed of variety of long filament: with the size of cocoon filament Chinese line breeding material thin, that evenness is good, the silk long filament is long is the parent; Adopt the living pupa and cocoon-reeling method; Thin with the size of cocoon filament, evenness good, silk long filament length is target directed selection of many generations, cultivates into the long basic kind of Chinese system long filament, same quadrat method; With size of cocoon filament japanese system breeding material thin, that evenness is good, the silk long filament is long is the parent, cultivates into the long basic kind of japanese system long filament;
(2) the fine denier robustness autumn in summer is used the silkworm breed of variety in: adopt systematic selection to cultivate thin, strong Chinese system autumn in summer kind and the japanese system summer autumn kind of physique in the size of cocoon filament;
The Chinese system mutual cross mutually of (3) respectively above-mentioned (1) and (2) being cultivated, the mutual cross of japanese system phase, be combined into " in * in " and " day * day " form;
(4) according to " (in * in) * (day * day) " mode mutual cross mutually, combine the four-way cross combination with " (day * day) * (in * in) ", be the new varieties that will cultivate.
No matter be used for breeding the original seed system of crossbreed or Japanese; All there is a side to be autumn in robustness summer silkworm kind for the long basic silkworm kind of long filament, the opposing party; Its hybrid combination be " (long filament is long * Xia Qiu) * (long filament is long * Xia Qiu) "; Or " (Xia Qiu * long filament is long) * (Xia Qiu * long filament is long) ", or " (Xia Qiu * long filament is long) * (long filament length * Xia Qiu) ", or " (long filament length * Xia Qiu) * (Xia Qiu * long filament is long) ".
Above-mentioned Chinese line breeding material is " spring sprouts ".
Above-mentioned japanese system breeding material is " 652 is new ".
Above-mentioned Chinese system autumn in summer kind is " 895 ".
Above-mentioned japanese system summer autumn kind is " 898 ".
The standard of parent and hybridization original seed:
One, the spring sprouts
1, source: " spring sprouts " is that the size of cocoon filament long filament thin, that evenness is good cultivated with Inst. of Silkworm, Chinese Academy of Agricultural Sciences's (hereinafter to be referred as " middle silkworm institute ") is that long in the silkworm kind treasured, the long system of CH8 long filament be that the parent is hybridized in long, filial generation through methods such as living pupa and cocoon-reeling to the silk proterties directed select that cultivation forms in be the silkworm kind.
2, principal character characteristic: in be kind, the ovum look grayish green; Larva is plain spot, and young silkworm phototaxis is strong, and the silkworm body is elongated; Cocoon shape is oval, cocoon weight 1.80g, cocoon layer rate about 25%, and the cocoon look pure white; Long 1400m～the 1800m of silk; Size of cocoon filament 2.40dtex～2.60dtex, the size of cocoon filament is even.Full age is through 24 days, in stinging through 16 days.
Two, 895
1, source: " 895 " are selected to cultivate through system for the plain spot strain of silkworm kind " Qiu Feng " and are formed.
2, principal character characteristic: in be kind, the ovum look grayish green; Larva is plain spot, and the silkworm body is sturdy, and physique is strong, and anti-mulberry leaf fluoride pollution performance is strong; Cocoon shape is oval, and size is medium, cocoon weight 1.80g, cocoon layer rate about 25%, and the cocoon look pure white; The silk cleaning is excellent; Full age is through 23 days, and through 15 days, it was good to breed performance in stinging.
Three, 652 is new
1, source: " 652 is new " is to be hybridized with " A16 " by middle silkworm institute's child care kind " 652 ", and filial generation is through methods such as the living pupa and cocoon-reeling Japanese kind that directed selection cultivation forms to the silk proterties.
2, principal character characteristic: Japanese kind, ovum look puce; Larva is common speckle, and the young silkworm photophobism is strong; Cocoon shape is with a tight waist, cocoon weight 1.65g, and cocoon layer rate 25.45%, look white; More than the long 1200m of silk; Size of cocoon filament 2.5dtex～2.8dtex, the size of cocoon filament is even; Full age is through 24 days, in stinging through 17 days.
Four, 898
1, source: " 898 " be middle silkworm institute child care kind, and cleaning is poor slightly, the Japanese kind that has emphasis ground that system's selection cultivation of clean proterties is formed through continuous 6 generations.
2, principal character characteristic: Japanese kind, ovum look puce; Larva is common speckle, and the young silkworm photophobism is strong, and physique is strong; Cocoon shape is with a tight waist, cocoon weight 1.60g, and cocoon layer rate 25%, the cocoon look pure white; More than the long 1200m of silk; Size of cocoon filament 2.5dtex～2.8dtex, the size of cocoon filament is even, clean 93-95 branch; Full age, through 17 days, coordinate force was good in stinging through 24 days.
Five, in original seed
1, source: by in be that the mutual cross of silkworm kind phase obtains, comprise " spring sprouts 895 ", " 895 spring sprouted ".
2, principal character characteristic: in be original seed, the ovum look grayish green; A gram ant number is 2200～2300; Larva is a plain silkworm, and the silkworm body is elongated; Cocoon shape is oval, and size is medium, cocoon weight 1.80g, cocoon layer rate about 25%, and the cocoon look pure white; Full age is through 24 days, in stinging through 16 days.Should postpone outbound on the 1st than Japanese original seed hastens the hatching of silkworms.
Six, Japanese original seed
1, source: obtain by Japanese silkworm kind phase mutual cross, comprise " 652 new 898 ", " 898652 is new ".
2, principal character characteristic: Japanese original seed, ovum look puce; A gram ant number is about 2200; Larva is common speckle; The young silkworm photophobism is strong; Cocoon shape is with a tight waist, and size is medium, cocoon weight 1.65g, cocoon layer rate about 25%, and the cocoon look pure white; Full age is through 24 days, in stinging through 17 days.Should than in be original seed outbound on the 1st ahead of time.
Seven, the standard of " No. one, silk rain "
The four-way cross kind is about 1780 on the every gram ovum of quadrature kind silkworm seed of female parent with middle system, is about 1630 of every grams of silkworm seed in the maternal reciprocal cross with Japanese.The egg-incubation homogeneous, the newly-hatched silkworm pitchy; Strong, the easy raising of larva physique.Cocoon shape is oval, and size is medium, and the cocoon look pure white, and is thin in the wrinkle that contracts; Cocoon weight 1.8g～2.0g, cocoon layer rate 23.0%～24.5%; Silk is of fine quality good, the long 1200m～1300m of silk, reelability percentage 75%～80%, size of cocoon filament 2.5dtex～3.0dtex, silk good evenness, the comprehensive mean square error 0.482dtex of the size of cocoon filament; Cleanliness 93 minutes～94 minutes; It is good to breed performance, 4.64～5.28 of kilogram cocoon production of hybrid seeds amounts.Be fit to the Yangtze river basin and Huanghe valley spring, raising in autumn.Promoting mainly the silkworm kind in No. one, rain " silk " and the present production compares and has the following advantages:
One, evenly thin in silk length length, the fiber number
Participated in " 15 " national science and technology tackling key problem unit consolidation evaluation of forming by middle silkworm institute, Silk Worm Inst Zhejiang Prov. Agriculture Science Academy, Institute of Sericulture, Anhui Academy of Agricultural Sciences and Yantai, Shandong Province seed station spring in 2004 No. one, rain " silk "; Qualification result: " No. one, silk rain " long 1335m of silk, comparison increases 57m according to kind " cyanines pine * bright moon "; Size of cocoon filament 2.99dtex, comparison is dwindled 0.14dtex according to kind.2006-2007 autumn " No. one, silk rain " has participated in the laboratory, Jiangsu Province and has identified jointly, the long 1251m of silk, and comparison is according to the long 32m of kind " Su Ju * bright tiger "; Size of cocoon filament 2.60dtex, the comprehensive mean square error 0.482 of the size of cocoon filament, comparison reduces by 10.96% (0.32dtex), 16.17% (0.083dtex) according to kind respectively, shows the uniform characteristics of silk.
Two, output is high, silk quality is excellent
Participated in " 15 " national science and technology tackling key problem unit consolidation evaluation of forming by middle silkworm institute, Silk Worm Inst Zhejiang Prov. Agriculture Science Academy, Institute of Sericulture, Anhui Academy of Agricultural Sciences and Yantai, Shandong Province seed station spring in 2004 No. one, rain " silk "; Qualification result: " No. 1, silk rain " ten thousand amount of cocoon crop 21.92kg, comparison increases by 7.14% according to kind " cyanines pine * bright moon "; Ten thousand are produced silk amount 5.132kg, and comparison improves 4.27% according to kind; Clean 98.06 fens, compare according to kind and improve 2 percentage points; Cleanliness 95.0 minutes surpasses check variety.
Spring in 2006, examination was supported in rural area, Huzhou, Zhejiang, opened kind of an amount of cocoon crop 48kg, cocoon weight 1.94g, cocoon shell weight 0.478g, cocoon layer rate 24.61%.
Three, disease resistance is strong
" No. one, silk rain " participation " 15 " national science and technology tackling key problem spring in 2004 unit consolidation is identified qualification result: " No. one, silk rain " physique is strong, and larva vital rates 98.74%, worm pupa rate 98.04% all are higher than check variety; Dead cage rate 0.76% is superior to check variety.
Spring in 2006 carried out the fluoride tolerance ability to " No. one, silk rain " crossbreed and the BmNPV repellence has been measured.Use the Fluorinse dipping mulberry leaf (the actual fluorinated volume of mulberry leaf be 197mg/kg) of concentration, the test kind of feeding, the investigation quick index of fluorine (the quick index of fluorine is low more, and fluoride tolerance is strong more) as 150mg/kg.The quick index of fluorine of " No. one, silk rain " is 52.30; And the quick index of fluorine of check variety " Su Ju * bright tiger " is 96.12, the quick index 27.68 of fluorine of " Qiu Feng * white jade "; Show that " No. one, silk rain " fluoride tolerance can be higher than " Su Ju * bright tiger ", but be lower than anti-fluorine kind " Qiu Feng * white jade ".Per oral inoculation BmNPV polyhedron is measured half lethal concentration IC
50(grain/ml), the result shows " No. one, silk rain " (IC
50Be 1.07 * 10
6) to the BmNPV repellence a little more than " Su Ju * bright tiger " (IC
50Be 5.49 * 10
5) and " Qiu Feng * white jade " (IC
50Be 4.48 * 10
5).
Four, it is good to breed performance
Participated in the laboratory, Jiangsu Province and identified jointly 2006-2007 autumn " No. one, silk rain ", " No. one, silk rain " original seed breed function admirable, breed the coefficient height, it is 5.28 boxes, Japanese 4.64 boxes that original seed is bred in the first generation cross-fertilize seed kilogram cocoon production of hybrid seeds amount; Comparison improves 70.87%, 6.42% according to kind " Su Ju * bright tiger " original seed kilogram cocoon production of hybrid seeds amount (in be 3.09 boxes, Japanese 4.36 boxes) respectively, on average improves 33.29%.
Beneficial effect: the present invention is that long in the silkworm kind treasured, the long system of CH8 long filament is the parent in long with the good long filament of the thin evenness of the size of cocoon filament; Fixing through hybridization; Adopt the living pupa and cocoon-reeling method; Thin with the size of cocoon filament, evenness good, silk long filament length is target directed selection of many generations, is the long basic silkworm kind " spring sprouts " of long filament in cultivating; With Japanese silkworm kind 652, A16 is the parent, fixing through hybridization, adopts the living pupa and cocoon-reeling method, thin with the size of cocoon filament, evenness good, silk long filament length is target directed selection of many generations, cultivates into the long basic silkworm kind " 652 is new " of Japanese long filament.The excellent characteristics of silk quality such as " spring sprouts ", " 652 is new " all have strong, the easy raising of physique, and be thin in the size of cocoon filament, that the comprehensive mean square error of the size of cocoon filament is little, long filament is long.Simultaneously, be the autumn in robustness summer to select to cultivate " 895 " and " 898 " with silkworm kind " 898 " system through centering with the plain spot strain of silkworm kind " Qiu Feng ", autumn in Japanese robustness summer.
The present invention adopts long basic kind of homologous ray long filament and the mode of Xia Qiu with inter breed crossing, through " spring sprouts " * " 895 ", is to hybridize original seed " spring sprouts 895 ", " 895 spring sprouted " in the preparation; Through " 652 is new " * " 898 ", prepare Japanese hybridization original seed " 652 new 898 ", " 898652 is new ".In raising respectively is original seed and Japanese original seed again, and the hybridization back produces " No. one, silk rain " crossbreed.This crossbreed has strong, the easy raising of physique concurrently; The characteristics thin in the size of cocoon filament, that the comprehensive mean square error of the size of cocoon filament is little, silk quality is excellent; Overcome that the comprehensive mean square error of the existing multifibres amount silkworm kind size of cocoon filament is bigger than normal, Xia Qiu is strong with silkworm kind physique but shortcoming that the silk amount is few; The requirement of accords with production 5A, 6A level high-grade raw silk, it is applied the gap of dwindling China's raw silk deviation and international most advanced level.
Embodiment
Below in conjunction with instance the present invention's " selection of fine denier silkworm kind in a kind of " is further described:
Embodiment 1:
One, silkworm kind and breeding quarry
" spring sprouts ", " 652 is new ", " 895 " and " 898 " are cultivated and are preserved by Inst. of Silkworm, Chinese Academy of Agricultural Sciences, and can externally provide.Its breeding parent can be inquired about in " fortunatus kind will " (the publishing in 1987) by the chief editor of Inst. of Silkworm, Chinese Academy of Agricultural Sciences; And retrieval in the heart in state's eggs of silkworm matter resource preservation of Inst. of Silkworm, Chinese Academy of Agricultural Sciences website (http://www.sricaas.com), some can be inquired about in public web site such as Baidu.
Two, principal character characteristic
1, the spring sprouts: in be multifibres amount silkworm kind, have that the size of cocoon filament is thin, evenness is good and the long characteristics of silk, but physique a little less than.
2,652 is new: Japanese multifibres amount silkworm kind has that the size of cocoon filament is thin, evenness is good and the long characteristics of silk, but separates easypro relatively poor.
3,895: in be the strain of autumn in summer with silkworm kind " Qiu Feng ", larva has plain spot, system is strong, silk quality is excellent, it is good to breed performance.
4,898: the Japanese autumn in summer is used the silkworm kind, and it is excellent to have silk quality, breed the good characteristics of performance, but the silk cleaning is poor slightly.
Three, concrete selection
1, " spring sprouts ": be that long in the silkworm kind treasured, the long system of CH8 long filament is that the parent is hybridized during the long filament thin with the size of cocoon filament, that evenness is good is long, raise filial generation, select that vitality is strong, the cocoon look pure white, reserve seed for planting in the big or small neat and well spaced moth district of cocoon shape.In the moth district of reserving seed for planting, select good silk cocoon to carry out living pupa and cocoon-reeling.According to the living pupa and cocoon-reeling achievement, select silk length length, Xie Shuhao, the medium individuality of fiber number, the back of sprouting wings is with the mating production of hybrid seeds of moth district.The continuous 6 generations selection of process is cultivated, and is silkworm kind " spring sprouts " in breeding, and its main feature is thin and even in silk length length, the size of cocoon filament.
2, " 895 ": by in be the plain spot strain of silkworm kind " Qiu Feng ", through how select to cultivate and form for the systems of vitality, silk quality etc., its main feature is that physique is strong, it is good to breed performance.
3, " 652 is new ": with child care kind " 652 " is the parent, and the hyperemia improvement is carried out in silkworm institute child care kind " A16 " hybridization in using, and selects to cultivate through many generations, breeds Japanese kind " 652 is new ", and its main feature is that the size of cocoon filament is medium even.
4, " 898 ": child care kind " 898 " cleaning is poor slightly, and other economic characters are good.For this reason, have emphasis ground that the clean proterties of " 898 " is carried out system through continuous 6 generations and select, cultivate into Japanese kind " 898 ", it is mainly put is that the size of cocoon filament is medium evenly, clean good.
5, the apolegamy of No., rain " silk ": select that the size of cocoon filament is thin, Xie Shuhao, cleanliness is excellent and silk length is long silkworm kind " Bao Zhongchang ", " spring sprouts ", " 652 ", " 652 is new " etc.; The autumn in summer that physique is strong, silk matter is more excellent with silkworm kind " 932 ", " Qiu Feng ", " bright ", " 7532 ", " 898 ", " 854B ", " white jade " etc. as the parent; Carrying out the test cross test according to the form of " middle system * Japanese " and " Japanese * middle system ", is check variety with " cyanines pine * bright moon ", " Qiu Feng * white jade ".Therefrom filter out 11 coordinate force good, meet the two-way cross combination of breeding objective basically: " spring sprout * 652 ", " spring sprout * 898 ", " Qiu Feng * 652 ", " bright * 898 ", " Qiu Feng * 652 are new " etc.
Above-mentioned parent is combined the combination of 60 multiple crosses, carry out new acquaintance's evaluation, select 6 of hybrid combinations that meet breeding objective.Further yield stability, resistance and laying performance and other comprehensive shape of kind are identified comparison again, poor environment further is set, in adverse circumstance, carry out vitality and select.Select thin in 1 size of cocoon filament, the comprehensive good best of breed " spring sprouts 895 * 652 new 898 " of proterties at last.Name and be " No. one, silk rain ".
Four, seed selection condition
1, the equipment and the technology that possess cultivated silkworm breed variety preservation, breeding of new variety and silkworm egg reproduction.
2, the silkworm rearing place and the appointed condition that possess Controllable Temperature (5 ℃-30 ℃).
3, possess the silkworm silk quality method of inspection (Inst. of Silkworm, Chinese Academy of Agricultural Sciences, Chinese sericulture, Science and Technology of Shanghai publishing house, in January, 1991: 629-709) be used for living pupa and cocoon-reeling single cocoon reeling equipment.
4, possess pebrine disease quarantine and examination method (Inst. of Silkworm, Chinese Academy of Agricultural Sciences, Chinese sericulture. Science and Technology of Shanghai publishing house, in January, 1991: 591-598; GB/T 19178-2003 " silkworm original seed inspection procedure ") and inspection technology and equipment.
Five, the parent preserves and raising technology
1, the parent preserves to raise and requires the single moth of branch kind district, and each kind is raised quantity and is no less than 10 moth districts.
2, select to meet the proterties of kind own, silk matter achievement in the moth district batch more than the mean, again in select in the moth district selection defect individual to breed.
3, breeder's stock is bred and is carried out the district's mating of different moth, the female kind of in the moth district of reserving seed for planting, selecting and remain according to qualifications.Production of hybrid seeds stepmother moth carries out the pebrine quarantine and examination one by one, eliminates the silkworm seed that female moth produced of band particulate spore.
4, preservation of silkworm eggs is identical with common variety.
Six, first generation cross-fertilize seed raising technology
Adopt the different kind mating of homologous ray when 1, parental stock is produced, raise Start Date through confirming the length of time, guarantee that parental breed sprouts wings on the same day according to kind; The stepmother moth that lays eggs should carry out the pebrine disease check, and other requires same common variety.
2, in the first generation cross-fertilize seed reproductive process, middle system, Japanese former silkworm should separately be raised, and according to raising Start Date through confirming in silkworm kind length of time, guarantee that parents meet on date of sprouting wings.
3, the female moth that produces crossbreed should carry out the pebrine disease quarantine and examination, and the pebrine disease disqualified upon inspection should be eliminated; Preservation of silkworm eggs, arrangement, product inspection and preservation transportation etc., consistent with common variety.
Seven, first generation cross-fertilize seed is raised technical essential
1, notes assanation, carry out the sterilizing prevent disease work of silkworm room, rearing instrument and silkworm rearing bed, silkworm body.
2, raise with standard atmosphere, the rearing of young silkworms temperature should not be low excessively.
3, silkworm rearing bed head number can not be overstocked the grown silkworm phase, and mulberry leaf should bright new proper mature (ripe), and good mulberry is satiated with food, and avoids feeding and raises wet leaves.
4, prevent pesticide pollution mulberry leaf and air, stop trace pesticide and poison and the silkworm generation of not cocooing.
5, being placed on small straw bundles to spin cocoons should not be overstocked, keeps a small bundle of straw, etc. for silkworms to spin cocoons on chamber ventilated.Use grid a small bundle of straw, etc. for silkworms to spin cocoons on to be placed on small straw bundles to spin cocoons, guarantee to separate Shu Youliang.
Claims (6)
1. the selection of fine denier silkworm kind in a kind is characterized in that step is:
(1) the long basic breed of variety of long filament: with the size of cocoon filament Chinese line breeding material thin, that evenness is good, the silk long filament is long is the parent; Adopt the living pupa and cocoon-reeling method; Thin with the size of cocoon filament, evenness good, silk long filament length is target directed selection of many generations, cultivates into the long basic kind of Chinese system long filament, same quadrat method; With size of cocoon filament japanese system breeding material thin, that evenness is good, the silk long filament is long is the parent, cultivates into the long basic kind of japanese system long filament;
(2) the fine denier robustness autumn in summer is used the silkworm breed of variety in: adopt systematic selection to cultivate thin, strong Chinese system autumn in summer kind and the japanese system summer autumn kind of physique in the size of cocoon filament;
The Chinese system mutual cross mutually of (3) respectively above-mentioned (1) and (2) being cultivated, the mutual cross of japanese system phase, be combined into " in * in " and " day * day " form;
(4) according to " (in * in) * (day * day) " mode mutual cross mutually, combine the four-way cross combination with " (day * day) * (in * in) ", be the new varieties that will cultivate.
2. the selection of a kind of middle fine denier silkworm kind according to claim 1; It is characterized in that: no matter be used for breeding the original seed system of crossbreed or Japanese; All there is a side to be autumn in robustness summer silkworm kind for the long basic silkworm kind of long filament, the opposing party; Its hybrid combination be " (long filament is long * Xia Qiu) * (long filament is long * Xia Qiu) "; Or " (Xia Qiu * long filament is long) * (Xia Qiu * long filament is long) ", or " (Xia Qiu * long filament is long) * (long filament length * Xia Qiu) ", or " (long filament length * Xia Qiu) * (Xia Qiu * long filament is long) ".
3. the selection of a kind of middle fine denier silkworm kind according to claim 1 is characterized in that: Chinese line breeding material is " spring sprouts ".
4. the selection of a kind of middle fine denier silkworm kind according to claim 1 is characterized in that: japanese system breeding material is " 652 is new ".
5. the selection of a kind of middle fine denier silkworm kind according to claim 1 is characterized in that: Chinese system autumn in summer kind is " 895 ".
6. the selection of a kind of middle fine denier silkworm kind according to claim 1 is characterized in that: japanese system summer autumn kind is " 898 ".
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| CN103070138A (en) * | 2013-02-04 | 2013-05-01 | 江苏科技大学 | Method for breeding hypersilk, bombyx mori densovirus-resistant and fluoride-resistant silkworm variety |
| CN103081872A (en) * | 2013-02-04 | 2013-05-08 | 江苏科技大学 | Method for breeding double-limitation multi-silk-quantity domestic silkworm breed |
| CN107980734A (en) * | 2017-12-11 | 2018-05-04 | 湖北省农业科学院经济作物研究所 | A kind of selection of high-quality strong cultivated silkworm breed variety |
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| CN102934626A (en) * | 2012-11-19 | 2013-02-20 | 四川省苏稽蚕种场 | Method for breading new species of silkworm trimolters by using dominant trimolter genes M3 |
| CN103070138A (en) * | 2013-02-04 | 2013-05-01 | 江苏科技大学 | Method for breeding hypersilk, bombyx mori densovirus-resistant and fluoride-resistant silkworm variety |
| CN103081872A (en) * | 2013-02-04 | 2013-05-08 | 江苏科技大学 | Method for breeding double-limitation multi-silk-quantity domestic silkworm breed |
| CN107980734A (en) * | 2017-12-11 | 2018-05-04 | 湖北省农业科学院经济作物研究所 | A kind of selection of high-quality strong cultivated silkworm breed variety |
| CN110352918A (en) * | 2019-08-15 | 2019-10-22 | 重庆三峡农业科学院(重庆市万州区甘宁蚕种场) | A kind of raising quality of silkworm eggs method |
| CN110959584A (en) * | 2019-12-20 | 2020-04-07 | 四川省农业科学院蚕业研究所 | Breeding method for improving silk quality |
| CN115053868A (en) * | 2022-07-14 | 2022-09-16 | 云南省农业科学院蚕桑蜜蜂研究所 | Breeding method of practical strain of silkworm with strong nuclear polyhedrosis tolerance |
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